/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 04:40:41,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 04:40:41,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 04:40:41,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 04:40:41,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 04:40:41,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 04:40:41,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 04:40:41,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 04:40:41,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 04:40:41,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 04:40:41,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 04:40:41,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 04:40:41,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 04:40:41,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 04:40:41,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 04:40:41,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 04:40:41,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 04:40:41,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 04:40:41,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 04:40:41,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 04:40:41,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 04:40:41,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 04:40:41,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 04:40:41,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 04:40:41,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-10-16 04:40:41,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 04:40:41,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 04:40:41,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 04:40:41,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 04:40:41,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 04:40:41,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 04:40:41,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 04:40:41,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 04:40:41,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 04:40:41,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 04:40:41,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 04:40:41,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-16 04:40:41,524 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 04:40:41,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 04:40:41,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 04:40:41,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 04:40:41,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 04:40:41,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 04:40:41,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 04:40:41,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 04:40:41,532 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 04:40:41,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 04:40:41,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 04:40:41,534 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 04:40:41,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 04:40:41,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 04:40:41,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 04:40:41,535 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-16 04:40:41,535 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-16 04:40:41,535 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-16 04:40:41,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 04:40:41,535 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-16 04:40:41,536 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 04:40:41,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 04:40:41,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 04:40:41,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 04:40:41,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 04:40:41,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:40:41,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 04:40:41,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 04:40:41,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 04:40:41,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 04:40:41,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 04:40:41,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 04:40:41,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 04:40:41,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 04:40:41,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 04:40:41,991 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 04:40:41,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-10-16 04:40:42,075 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5894eae0f/b0e24cdd9cba4182acefdedb126d4370/FLAG15b4210a4 [2022-10-16 04:40:42,819 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 04:40:42,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-memory-alloca/openbsd_cstrcspn-alloca-1.i [2022-10-16 04:40:42,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5894eae0f/b0e24cdd9cba4182acefdedb126d4370/FLAG15b4210a4 [2022-10-16 04:40:43,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5894eae0f/b0e24cdd9cba4182acefdedb126d4370 [2022-10-16 04:40:43,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 04:40:43,076 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 04:40:43,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 04:40:43,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 04:40:43,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 04:40:43,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b21600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43, skipping insertion in model container [2022-10-16 04:40:43,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 04:40:43,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 04:40:43,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:40:43,682 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 04:40:43,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 04:40:43,805 INFO L208 MainTranslator]: Completed translation [2022-10-16 04:40:43,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43 WrapperNode [2022-10-16 04:40:43,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 04:40:43,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 04:40:43,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 04:40:43,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 04:40:43,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,897 INFO L138 Inliner]: procedures = 111, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-10-16 04:40:43,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 04:40:43,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 04:40:43,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 04:40:43,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 04:40:43,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,952 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 04:40:43,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 04:40:43,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 04:40:43,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 04:40:43,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (1/1) ... [2022-10-16 04:40:43,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 04:40:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:43,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 04:40:44,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 04:40:44,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 04:40:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 04:40:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 04:40:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 04:40:44,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 04:40:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 04:40:44,185 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 04:40:44,187 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 04:40:44,403 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 04:40:44,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 04:40:44,411 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-16 04:40:44,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:40:44 BoogieIcfgContainer [2022-10-16 04:40:44,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 04:40:44,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 04:40:44,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 04:40:44,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 04:40:44,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 04:40:43" (1/3) ... [2022-10-16 04:40:44,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579e875a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:40:44, skipping insertion in model container [2022-10-16 04:40:44,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 04:40:43" (2/3) ... [2022-10-16 04:40:44,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579e875a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 04:40:44, skipping insertion in model container [2022-10-16 04:40:44,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 04:40:44" (3/3) ... [2022-10-16 04:40:44,425 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-1.i [2022-10-16 04:40:44,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 04:40:44,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-10-16 04:40:44,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 04:40:44,519 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ecdde19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 04:40:44,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-10-16 04:40:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-16 04:40:44,532 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:44,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-16 04:40:44,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:44,541 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2022-10-16 04:40:44,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:44,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089686811] [2022-10-16 04:40:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:44,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:44,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089686811] [2022-10-16 04:40:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089686811] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:44,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:44,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:40:44,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775277325] [2022-10-16 04:40:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:45,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:40:45,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:40:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:45,056 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:45,143 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-10-16 04:40:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:40:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-16 04:40:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:45,155 INFO L225 Difference]: With dead ends: 28 [2022-10-16 04:40:45,155 INFO L226 Difference]: Without dead ends: 26 [2022-10-16 04:40:45,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:45,162 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:45,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-16 04:40:45,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-10-16 04:40:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-10-16 04:40:45,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6 [2022-10-16 04:40:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:45,203 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-10-16 04:40:45,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-10-16 04:40:45,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-16 04:40:45,204 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:45,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-16 04:40:45,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 04:40:45,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:45,206 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2022-10-16 04:40:45,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:45,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313942007] [2022-10-16 04:40:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:45,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:45,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313942007] [2022-10-16 04:40:45,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313942007] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:45,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:45,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:40:45,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839172854] [2022-10-16 04:40:45,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:45,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:45,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:45,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:45,545 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:45,686 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-10-16 04:40:45,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-16 04:40:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:45,688 INFO L225 Difference]: With dead ends: 48 [2022-10-16 04:40:45,688 INFO L226 Difference]: Without dead ends: 48 [2022-10-16 04:40:45,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:45,693 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:45,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 78 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-16 04:40:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2022-10-16 04:40:45,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-10-16 04:40:45,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2022-10-16 04:40:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:45,708 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-10-16 04:40:45,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-10-16 04:40:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-16 04:40:45,710 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:45,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-16 04:40:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 04:40:45,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2022-10-16 04:40:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134215803] [2022-10-16 04:40:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134215803] [2022-10-16 04:40:45,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134215803] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:45,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:45,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:40:45,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856343590] [2022-10-16 04:40:45,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:45,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:40:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:40:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:45,985 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:46,027 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-10-16 04:40:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:40:46,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-16 04:40:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:46,033 INFO L225 Difference]: With dead ends: 28 [2022-10-16 04:40:46,033 INFO L226 Difference]: Without dead ends: 28 [2022-10-16 04:40:46,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:46,041 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:46,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-10-16 04:40:46,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-10-16 04:40:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-10-16 04:40:46,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2022-10-16 04:40:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:46,055 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-10-16 04:40:46,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-10-16 04:40:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:46,057 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:46,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 04:40:46,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:46,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:46,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2022-10-16 04:40:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:46,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355160090] [2022-10-16 04:40:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:46,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:46,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355160090] [2022-10-16 04:40:46,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355160090] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:46,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:46,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-16 04:40:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158294223] [2022-10-16 04:40:46,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:46,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-16 04:40:46,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-16 04:40:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:46,146 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:46,172 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-10-16 04:40:46,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-16 04:40:46,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:40:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:46,176 INFO L225 Difference]: With dead ends: 24 [2022-10-16 04:40:46,176 INFO L226 Difference]: Without dead ends: 24 [2022-10-16 04:40:46,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-16 04:40:46,182 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:46,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-16 04:40:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-16 04:40:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-16 04:40:46,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2022-10-16 04:40:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:46,192 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-16 04:40:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-16 04:40:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-16 04:40:46,193 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:46,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:46,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 04:40:46,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2022-10-16 04:40:46,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:46,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399455522] [2022-10-16 04:40:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:46,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:46,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:46,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399455522] [2022-10-16 04:40:46,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399455522] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:46,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:46,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:40:46,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252109985] [2022-10-16 04:40:46,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:46,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:40:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:46,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:40:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:46,336 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:46,382 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-10-16 04:40:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:40:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-16 04:40:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:46,387 INFO L225 Difference]: With dead ends: 23 [2022-10-16 04:40:46,387 INFO L226 Difference]: Without dead ends: 23 [2022-10-16 04:40:46,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:46,389 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:46,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-10-16 04:40:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-10-16 04:40:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-10-16 04:40:46,397 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 7 [2022-10-16 04:40:46,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:46,401 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-10-16 04:40:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-10-16 04:40:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 04:40:46,402 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:46,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:46,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 04:40:46,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:46,406 INFO L85 PathProgramCache]: Analyzing trace with hash 624631727, now seen corresponding path program 1 times [2022-10-16 04:40:46,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:46,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226904239] [2022-10-16 04:40:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:46,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226904239] [2022-10-16 04:40:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226904239] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:46,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:46,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 04:40:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429662249] [2022-10-16 04:40:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:46,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 04:40:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 04:40:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 04:40:46,501 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:46,549 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2022-10-16 04:40:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 04:40:46,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 04:40:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:46,550 INFO L225 Difference]: With dead ends: 22 [2022-10-16 04:40:46,550 INFO L226 Difference]: Without dead ends: 22 [2022-10-16 04:40:46,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:46,555 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:46,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-16 04:40:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-16 04:40:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-10-16 04:40:46,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-10-16 04:40:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:46,566 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-10-16 04:40:46,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-10-16 04:40:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-16 04:40:46,567 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:46,567 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:46,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 04:40:46,568 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash 624631728, now seen corresponding path program 1 times [2022-10-16 04:40:46,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602279185] [2022-10-16 04:40:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602279185] [2022-10-16 04:40:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602279185] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:46,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:46,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-16 04:40:46,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069248816] [2022-10-16 04:40:46,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:46,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 04:40:46,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:46,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 04:40:46,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-16 04:40:46,753 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:46,839 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-10-16 04:40:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:40:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-16 04:40:46,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:46,840 INFO L225 Difference]: With dead ends: 25 [2022-10-16 04:40:46,840 INFO L226 Difference]: Without dead ends: 25 [2022-10-16 04:40:46,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:40:46,842 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:46,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 55 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-16 04:40:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-10-16 04:40:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-16 04:40:46,847 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-10-16 04:40:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-16 04:40:46,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-16 04:40:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:40:46,848 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:46,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:46,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-16 04:40:46,849 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:46,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1689510410, now seen corresponding path program 1 times [2022-10-16 04:40:46,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:46,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49560440] [2022-10-16 04:40:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:46,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:46,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:46,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49560440] [2022-10-16 04:40:46,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49560440] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:46,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:46,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 04:40:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885492812] [2022-10-16 04:40:46,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-16 04:40:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-16 04:40:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-16 04:40:46,931 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:47,011 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-10-16 04:40:47,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-16 04:40:47,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 04:40:47,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:47,012 INFO L225 Difference]: With dead ends: 24 [2022-10-16 04:40:47,012 INFO L226 Difference]: Without dead ends: 24 [2022-10-16 04:40:47,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-16 04:40:47,014 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:47,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 38 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-16 04:40:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-10-16 04:40:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-10-16 04:40:47,018 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2022-10-16 04:40:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:47,019 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-10-16 04:40:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-10-16 04:40:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-16 04:40:47,020 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:47,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:47,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-16 04:40:47,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1689510409, now seen corresponding path program 1 times [2022-10-16 04:40:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269409002] [2022-10-16 04:40:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:47,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269409002] [2022-10-16 04:40:47,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269409002] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:47,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:47,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 04:40:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898101985] [2022-10-16 04:40:47,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 04:40:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:47,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 04:40:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-16 04:40:47,192 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:47,309 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-10-16 04:40:47,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 04:40:47,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-16 04:40:47,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:47,311 INFO L225 Difference]: With dead ends: 27 [2022-10-16 04:40:47,311 INFO L226 Difference]: Without dead ends: 27 [2022-10-16 04:40:47,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-16 04:40:47,313 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 80 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:47,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-10-16 04:40:47,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-10-16 04:40:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-10-16 04:40:47,317 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-10-16 04:40:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:47,318 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-10-16 04:40:47,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-10-16 04:40:47,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-16 04:40:47,319 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:47,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:47,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 04:40:47,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1148853382, now seen corresponding path program 1 times [2022-10-16 04:40:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:47,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999000899] [2022-10-16 04:40:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:47,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:47,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999000899] [2022-10-16 04:40:47,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999000899] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:47,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:47,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 04:40:47,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073338156] [2022-10-16 04:40:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:47,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 04:40:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 04:40:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:47,508 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:47,528 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-10-16 04:40:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 04:40:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-16 04:40:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:47,529 INFO L225 Difference]: With dead ends: 24 [2022-10-16 04:40:47,530 INFO L226 Difference]: Without dead ends: 22 [2022-10-16 04:40:47,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 04:40:47,531 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:47,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-16 04:40:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-16 04:40:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-16 04:40:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-10-16 04:40:47,535 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-10-16 04:40:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:47,535 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-10-16 04:40:47,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:47,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-10-16 04:40:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:40:47,536 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:47,536 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:47,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-16 04:40:47,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1254666500, now seen corresponding path program 1 times [2022-10-16 04:40:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:47,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104826309] [2022-10-16 04:40:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:48,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104826309] [2022-10-16 04:40:48,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104826309] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:48,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:48,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-10-16 04:40:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645632531] [2022-10-16 04:40:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-16 04:40:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-16 04:40:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-10-16 04:40:48,031 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:48,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:48,787 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-10-16 04:40:48,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:40:48,788 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 04:40:48,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:48,789 INFO L225 Difference]: With dead ends: 40 [2022-10-16 04:40:48,789 INFO L226 Difference]: Without dead ends: 40 [2022-10-16 04:40:48,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:40:48,790 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:48,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 131 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:48,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-10-16 04:40:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-10-16 04:40:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-10-16 04:40:48,796 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-10-16 04:40:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:48,796 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-10-16 04:40:48,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-10-16 04:40:48,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:40:48,798 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:48,798 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 04:40:48,798 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:48,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1254664322, now seen corresponding path program 1 times [2022-10-16 04:40:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081950651] [2022-10-16 04:40:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081950651] [2022-10-16 04:40:49,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081950651] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 04:40:49,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 04:40:49,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-16 04:40:49,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098346210] [2022-10-16 04:40:49,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 04:40:49,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-16 04:40:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-16 04:40:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-16 04:40:49,026 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:49,221 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2022-10-16 04:40:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:40:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 04:40:49,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:49,224 INFO L225 Difference]: With dead ends: 72 [2022-10-16 04:40:49,224 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 04:40:49,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-10-16 04:40:49,225 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:49,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 113 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:40:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 04:40:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2022-10-16 04:40:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-10-16 04:40:49,239 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 18 [2022-10-16 04:40:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:49,239 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-10-16 04:40:49,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-10-16 04:40:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:40:49,246 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:49,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:49,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-16 04:40:49,246 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1760439296, now seen corresponding path program 1 times [2022-10-16 04:40:49,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:49,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080774244] [2022-10-16 04:40:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:49,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080774244] [2022-10-16 04:40:49,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080774244] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194394501] [2022-10-16 04:40:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:49,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:49,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:40:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 04:40:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core [2022-10-16 04:40:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:49,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:40:50,310 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:50,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-10-16 04:40:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:50,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:50,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-10-16 04:40:50,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-10-16 04:40:50,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-10-16 04:40:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:50,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194394501] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:50,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:50,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-10-16 04:40:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77373162] [2022-10-16 04:40:50,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:50,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-16 04:40:50,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-16 04:40:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-10-16 04:40:50,969 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:51,289 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-10-16 04:40:51,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-16 04:40:51,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 04:40:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:51,290 INFO L225 Difference]: With dead ends: 81 [2022-10-16 04:40:51,290 INFO L226 Difference]: Without dead ends: 81 [2022-10-16 04:40:51,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-10-16 04:40:51,292 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:51,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 119 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-10-16 04:40:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-16 04:40:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-10-16 04:40:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-10-16 04:40:51,298 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 18 [2022-10-16 04:40:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:51,299 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-10-16 04:40:51,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-10-16 04:40:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-16 04:40:51,300 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:51,300 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:51,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:51,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-16 04:40:51,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:51,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2019232442, now seen corresponding path program 1 times [2022-10-16 04:40:51,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:51,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710885372] [2022-10-16 04:40:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:51,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:52,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:52,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710885372] [2022-10-16 04:40:52,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710885372] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260670135] [2022-10-16 04:40:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:52,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:52,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:52,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:40:52,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 04:40:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 55 conjunts are in the unsatisfiable core [2022-10-16 04:40:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:52,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:40:52,435 INFO L356 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2022-10-16 04:40:52,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-10-16 04:40:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-16 04:40:52,653 INFO L356 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-10-16 04:40:52,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2022-10-16 04:40:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:52,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:53,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-10-16 04:40:53,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-10-16 04:40:53,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-10-16 04:40:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:53,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260670135] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:53,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:53,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 34 [2022-10-16 04:40:53,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637144562] [2022-10-16 04:40:53,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:53,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-16 04:40:53,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-16 04:40:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-10-16 04:40:53,411 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:55,497 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-10-16 04:40:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-16 04:40:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-16 04:40:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:55,498 INFO L225 Difference]: With dead ends: 83 [2022-10-16 04:40:55,498 INFO L226 Difference]: Without dead ends: 83 [2022-10-16 04:40:55,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-10-16 04:40:55,501 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 169 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:55,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 168 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 397 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-10-16 04:40:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-16 04:40:55,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2022-10-16 04:40:55,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.12987012987013) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-10-16 04:40:55,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 18 [2022-10-16 04:40:55,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:55,507 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-10-16 04:40:55,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 35 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:55,507 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-10-16 04:40:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 04:40:55,508 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:55,509 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:55,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-16 04:40:55,724 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:55,725 INFO L85 PathProgramCache]: Analyzing trace with hash 269068053, now seen corresponding path program 2 times [2022-10-16 04:40:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:55,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548023734] [2022-10-16 04:40:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:55,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:40:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:56,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:40:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548023734] [2022-10-16 04:40:56,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548023734] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:40:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003672716] [2022-10-16 04:40:56,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:40:56,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:40:56,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:40:56,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 04:40:56,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:40:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:40:56,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2022-10-16 04:40:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:40:56,549 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:40:56,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:40:56,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:40:57,116 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:40:57,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-10-16 04:40:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:57,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:40:58,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:40:58,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-16 04:40:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:40:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003672716] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:40:58,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:40:58,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-10-16 04:40:58,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122851338] [2022-10-16 04:40:58,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:40:58,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-10-16 04:40:58,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:40:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-10-16 04:40:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-10-16 04:40:58,255 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 33 states, 32 states have (on average 1.84375) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:40:59,020 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-10-16 04:40:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-16 04:40:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-16 04:40:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:40:59,021 INFO L225 Difference]: With dead ends: 79 [2022-10-16 04:40:59,022 INFO L226 Difference]: Without dead ends: 59 [2022-10-16 04:40:59,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=1820, Unknown=0, NotChecked=0, Total=2070 [2022-10-16 04:40:59,025 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:40:59,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 141 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-10-16 04:40:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-16 04:40:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2022-10-16 04:40:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.12) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-10-16 04:40:59,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 23 [2022-10-16 04:40:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:40:59,029 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-10-16 04:40:59,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.84375) internal successors, (59), 33 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:40:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-10-16 04:40:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:40:59,031 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:40:59,031 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:40:59,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 04:40:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:40:59,246 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:40:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:40:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash 367562758, now seen corresponding path program 2 times [2022-10-16 04:40:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:40:59,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437026926] [2022-10-16 04:40:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:40:59,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:40:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:00,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437026926] [2022-10-16 04:41:00,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437026926] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:00,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477034111] [2022-10-16 04:41:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:00,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:00,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:00,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 04:41:00,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:00,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:00,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 52 conjunts are in the unsatisfiable core [2022-10-16 04:41:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:00,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:00,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-10-16 04:41:00,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:41:00,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-10-16 04:41:01,138 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:01,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-10-16 04:41:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:01,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:02,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:02,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-10-16 04:41:02,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:02,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2022-10-16 04:41:02,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-16 04:41:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477034111] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:02,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:02,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 40 [2022-10-16 04:41:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325855691] [2022-10-16 04:41:02,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:02,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-10-16 04:41:02,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-10-16 04:41:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1480, Unknown=15, NotChecked=0, Total=1640 [2022-10-16 04:41:02,657 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 41 states, 40 states have (on average 1.725) internal successors, (69), 41 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:03,831 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-10-16 04:41:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-16 04:41:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 41 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-16 04:41:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:03,832 INFO L225 Difference]: With dead ends: 67 [2022-10-16 04:41:03,832 INFO L226 Difference]: Without dead ends: 45 [2022-10-16 04:41:03,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=397, Invalid=2894, Unknown=15, NotChecked=0, Total=3306 [2022-10-16 04:41:03,835 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:03,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 224 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-10-16 04:41:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-16 04:41:03,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-10-16 04:41:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.146341463414634) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-10-16 04:41:03,838 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 26 [2022-10-16 04:41:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:03,838 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-10-16 04:41:03,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 41 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-10-16 04:41:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-16 04:41:03,840 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:03,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:03,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 04:41:04,047 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:41:04,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:04,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1437873398, now seen corresponding path program 1 times [2022-10-16 04:41:04,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:04,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431593405] [2022-10-16 04:41:04,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:04,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:04,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431593405] [2022-10-16 04:41:04,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431593405] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865594268] [2022-10-16 04:41:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:04,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:04,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:04,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 04:41:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:04,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 46 conjunts are in the unsatisfiable core [2022-10-16 04:41:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:04,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:41:04,604 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:04,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-10-16 04:41:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:04,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:05,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-10-16 04:41:05,759 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-10-16 04:41:05,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-10-16 04:41:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:05,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865594268] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:05,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:05,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 38 [2022-10-16 04:41:05,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37699121] [2022-10-16 04:41:05,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:05,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-10-16 04:41:05,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:05,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-10-16 04:41:05,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2022-10-16 04:41:05,778 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:06,955 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-10-16 04:41:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-16 04:41:06,956 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-16 04:41:06,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:06,957 INFO L225 Difference]: With dead ends: 71 [2022-10-16 04:41:06,957 INFO L226 Difference]: Without dead ends: 60 [2022-10-16 04:41:06,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=469, Invalid=2723, Unknown=0, NotChecked=0, Total=3192 [2022-10-16 04:41:06,960 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:06,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 191 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 355 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-10-16 04:41:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-10-16 04:41:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-10-16 04:41:06,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:06,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-10-16 04:41:06,964 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 26 [2022-10-16 04:41:06,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:06,965 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-10-16 04:41:06,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:06,965 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-10-16 04:41:06,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:41:06,966 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:06,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:07,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:07,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 04:41:07,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:41:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:07,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1811284961, now seen corresponding path program 1 times [2022-10-16 04:41:07,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:07,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344315605] [2022-10-16 04:41:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:07,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344315605] [2022-10-16 04:41:07,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344315605] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613722248] [2022-10-16 04:41:07,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:07,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:07,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:07,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:07,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 04:41:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2022-10-16 04:41:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:07,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 04:41:07,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-10-16 04:41:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:07,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613722248] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:07,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:07,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2022-10-16 04:41:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007068173] [2022-10-16 04:41:07,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-16 04:41:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-16 04:41:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-10-16 04:41:07,791 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:08,145 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-10-16 04:41:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:41:08,146 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:41:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:08,146 INFO L225 Difference]: With dead ends: 45 [2022-10-16 04:41:08,147 INFO L226 Difference]: Without dead ends: 45 [2022-10-16 04:41:08,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:41:08,148 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:08,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 189 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 04:41:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-16 04:41:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-10-16 04:41:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-10-16 04:41:08,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2022-10-16 04:41:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:08,152 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-10-16 04:41:08,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-10-16 04:41:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-16 04:41:08,153 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:08,153 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:08,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:08,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-16 04:41:08,363 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:41:08,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1811287139, now seen corresponding path program 2 times [2022-10-16 04:41:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983602349] [2022-10-16 04:41:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:08,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983602349] [2022-10-16 04:41:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983602349] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:08,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788580958] [2022-10-16 04:41:08,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:08,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:08,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:08,755 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:08,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 04:41:08,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-10-16 04:41:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:09,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:09,306 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:09,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-10-16 04:41:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:09,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788580958] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:09,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:09,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-10-16 04:41:09,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410077951] [2022-10-16 04:41:09,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:09,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-10-16 04:41:09,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-10-16 04:41:09,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-10-16 04:41:09,509 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:10,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:10,213 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-10-16 04:41:10,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 04:41:10,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-16 04:41:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:10,215 INFO L225 Difference]: With dead ends: 44 [2022-10-16 04:41:10,215 INFO L226 Difference]: Without dead ends: 44 [2022-10-16 04:41:10,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=376, Invalid=1786, Unknown=0, NotChecked=0, Total=2162 [2022-10-16 04:41:10,217 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 107 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:10,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 224 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-16 04:41:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-16 04:41:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-10-16 04:41:10,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-10-16 04:41:10,222 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2022-10-16 04:41:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:10,223 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-10-16 04:41:10,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-10-16 04:41:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 04:41:10,228 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:10,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:10,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:10,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:10,444 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:41:10,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1076001776, now seen corresponding path program 2 times [2022-10-16 04:41:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528802984] [2022-10-16 04:41:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:10,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 04:41:11,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:11,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528802984] [2022-10-16 04:41:11,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528802984] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:11,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374119052] [2022-10-16 04:41:11,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 04:41:11,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:11,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:11,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:11,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 04:41:11,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 04:41:11,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-16 04:41:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:11,370 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:11,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:11,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-10-16 04:41:11,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:41:11,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-10-16 04:41:11,921 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:11,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-10-16 04:41:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 04:41:12,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:13,231 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:13,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-10-16 04:41:13,240 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:13,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-10-16 04:41:13,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-10-16 04:41:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 04:41:13,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374119052] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:13,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:13,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 34 [2022-10-16 04:41:13,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521167845] [2022-10-16 04:41:13,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:13,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-16 04:41:13,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:13,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-16 04:41:13,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1060, Unknown=11, NotChecked=0, Total=1190 [2022-10-16 04:41:13,340 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:14,182 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-10-16 04:41:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 04:41:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-16 04:41:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:14,183 INFO L225 Difference]: With dead ends: 39 [2022-10-16 04:41:14,183 INFO L226 Difference]: Without dead ends: 39 [2022-10-16 04:41:14,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=2136, Unknown=11, NotChecked=0, Total=2450 [2022-10-16 04:41:14,185 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:14,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-10-16 04:41:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-10-16 04:41:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-10-16 04:41:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-10-16 04:41:14,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 36 [2022-10-16 04:41:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:14,188 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-10-16 04:41:14,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-10-16 04:41:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-16 04:41:14,189 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 04:41:14,189 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:14,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:14,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:14,400 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-10-16 04:41:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 04:41:14,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1075999598, now seen corresponding path program 3 times [2022-10-16 04:41:14,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 04:41:14,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736212681] [2022-10-16 04:41:14,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 04:41:14,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 04:41:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 04:41:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 04:41:14,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 04:41:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736212681] [2022-10-16 04:41:14,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736212681] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 04:41:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596427380] [2022-10-16 04:41:14,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-16 04:41:14,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:14,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 04:41:14,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 04:41:14,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 04:41:15,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-16 04:41:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 04:41:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-16 04:41:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 04:41:15,066 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-16 04:41:15,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-10-16 04:41:15,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-10-16 04:41:15,711 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 04:41:15,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-10-16 04:41:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 04:41:15,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 04:41:17,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:41:17,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-16 04:41:17,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-10-16 04:41:17,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-10-16 04:41:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 04:41:17,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596427380] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 04:41:17,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 04:41:17,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 37 [2022-10-16 04:41:17,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595068736] [2022-10-16 04:41:17,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 04:41:17,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-10-16 04:41:17,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 04:41:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-10-16 04:41:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-10-16 04:41:17,191 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 04:41:19,308 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-10-16 04:41:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-10-16 04:41:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-10-16 04:41:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 04:41:19,309 INFO L225 Difference]: With dead ends: 54 [2022-10-16 04:41:19,309 INFO L226 Difference]: Without dead ends: 0 [2022-10-16 04:41:19,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2022-10-16 04:41:19,311 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-16 04:41:19,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-10-16 04:41:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-16 04:41:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-16 04:41:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-16 04:41:19,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2022-10-16 04:41:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 04:41:19,313 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-16 04:41:19,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-16 04:41:19,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-16 04:41:19,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-16 04:41:19,317 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-10-16 04:41:19,317 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-10-16 04:41:19,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-10-16 04:41:19,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-10-16 04:41:19,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-10-16 04:41:19,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-10-16 04:41:19,318 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-10-16 04:41:19,319 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-10-16 04:41:19,319 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-10-16 04:41:19,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-16 04:41:19,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 04:41:19,540 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-16 04:41:19,543 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-16 04:41:19,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 04:41:19 BoogieIcfgContainer [2022-10-16 04:41:19,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-16 04:41:19,547 INFO L158 Benchmark]: Toolchain (without parser) took 36475.51ms. Allocated memory was 157.3MB in the beginning and 327.2MB in the end (delta: 169.9MB). Free memory was 131.2MB in the beginning and 199.6MB in the end (delta: -68.5MB). Peak memory consumption was 102.9MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,547 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 157.3MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-10-16 04:41:19,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 728.15ms. Allocated memory is still 157.3MB. Free memory was 131.0MB in the beginning and 115.7MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,548 INFO L158 Benchmark]: Boogie Procedure Inliner took 90.46ms. Allocated memory is still 157.3MB. Free memory was 115.7MB in the beginning and 113.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,549 INFO L158 Benchmark]: Boogie Preprocessor took 57.51ms. Allocated memory is still 157.3MB. Free memory was 113.8MB in the beginning and 112.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,550 INFO L158 Benchmark]: RCFGBuilder took 456.42ms. Allocated memory is still 157.3MB. Free memory was 112.2MB in the beginning and 137.7MB in the end (delta: -25.5MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,551 INFO L158 Benchmark]: TraceAbstraction took 35129.63ms. Allocated memory was 157.3MB in the beginning and 327.2MB in the end (delta: 169.9MB). Free memory was 137.2MB in the beginning and 199.6MB in the end (delta: -62.5MB). Peak memory consumption was 107.9MB. Max. memory is 8.0GB. [2022-10-16 04:41:19,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 157.3MB. Free memory is still 128.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 728.15ms. Allocated memory is still 157.3MB. Free memory was 131.0MB in the beginning and 115.7MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 90.46ms. Allocated memory is still 157.3MB. Free memory was 115.7MB in the beginning and 113.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 57.51ms. Allocated memory is still 157.3MB. Free memory was 113.8MB in the beginning and 112.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 456.42ms. Allocated memory is still 157.3MB. Free memory was 112.2MB in the beginning and 137.7MB in the end (delta: -25.5MB). Peak memory consumption was 17.0MB. Max. memory is 8.0GB. * TraceAbstraction took 35129.63ms. Allocated memory was 157.3MB in the beginning and 327.2MB in the end (delta: 169.9MB). Free memory was 137.2MB in the beginning and 199.6MB in the end (delta: -62.5MB). Peak memory consumption was 107.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 561]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 35.1s, OverallIterations: 21, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 11.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 958 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 958 mSDsluCounter, 2175 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 347 IncrementalHoareTripleChecker+Unchecked, 1878 mSDsCounter, 182 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2094 IncrementalHoareTripleChecker+Invalid, 2623 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 182 mSolverCounterUnsat, 297 mSDtfsCounter, 2094 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 855 GetRequests, 330 SyntacticMatches, 10 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4020 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=14, InterpolantAutomatonStates: 257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 97 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 20.0s InterpolantComputationTime, 621 NumberOfCodeBlocks, 621 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 827 ConstructedInterpolants, 154 QuantifiedInterpolants, 12591 SizeOfPredicates, 165 NumberOfNonLiveVariables, 1551 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 39 InterpolantComputations, 12 PerfectInterpolantSequences, 113/487 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-10-16 04:41:19,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...